US4522131A - Installation for the thermal treatment of pulverulent mineral products - Google Patents

Installation for the thermal treatment of pulverulent mineral products Download PDF

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Publication number
US4522131A
US4522131A US06/607,223 US60722384A US4522131A US 4522131 A US4522131 A US 4522131A US 60722384 A US60722384 A US 60722384A US 4522131 A US4522131 A US 4522131A
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Prior art keywords
furnace
cyclones
level
product
group
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Expired - Fee Related
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US06/607,223
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English (en)
Inventor
Jean Lebesgue
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Fives Cail Babcock SA
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Fives Cail Babcock SA
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Application filed by Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Assigned to FIVES-CAIL BABCOCK 7 RUE MONTALIVET, 75383 PARIS FRANCE reassignment FIVES-CAIL BABCOCK 7 RUE MONTALIVET, 75383 PARIS FRANCE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LEBESGUE, JEAN
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/434—Preheating with addition of fuel, e.g. calcining

Definitions

  • the present invention relates to improvements in an installation for the thermal treatment of a pulverulent mineral product by gases.
  • the mineral material to be treated is comminuted into powder form, preheated and then subjected to the thermal treatment proper whereafter it is cooled, the treatment being effected by heat exchange between currents of gas and the product suspended therein.
  • the installation comprises a furnace for the thermal treatment of the pulverulent mineral product in suspension in hot gases generated by the combustion of air and a fuel, two groups of series-connected cyclones connected to the furnace, one of the groups of cyclones being arranged upstream of the furnace and the other group of cyclones being arranged downstream of the furnace, and conduit means connecting the cyclones to each other and to the furnace so that exhaust gases from the furnace pass successively through all the cyclones of the one group while a current of air passes through all the cyclones of the other group before entering the furnace to serve as the combustion air, the exhaust gases heating the product before it enters the furnace and the air current cooling the treated product.
  • cyclone covers any suitable separator for separating solids from gaseous fluids, cyclones with vertical axes being specifically described and illustrated herein.
  • the product is separated from the gaseous fluid current to be suspended in an upstream portion of the gas circuit so that all of the heat exchanges take place in counter-current fashion.
  • the above and other objects are accomplished according to the invention with a superstructure affixed to the support frame and having support means at a second level higher than the first level.
  • the furnace and two of the cyclones located, respectively, immediately upstream and immediately downstream of the furnace are mounted on the support means of the support frame at the first level, and at least some of the remaining cyclones are mounted on the support means of the superstructure at the higher level.
  • the first level should be as low as practically possible and as far as compatible with the requirement of the evacuation of the product from the discharge points of the cyclones and of the input of the gaseous fluids and/or the product to be treated in the furnace or their evacuation therefrom when the same are effected through the bottom of the furnace.
  • the furnace and the two cyclones immediately upstream and downstream thereof are of brick or equipped with a refractory lining, they are quite heavy. Therefore, by placing them at a lower level than in known installations, the cost of the support means therefor is considerably reduced.
  • the remaining cyclones, through which the air or the exhaust gases from the furnace pass at a lower temperature, require no refractory lining and are, therefore, much lighter. They may be supported on a higher level on a relatively light superstructure affixed to the support frame. Equivalently, the remaining cyclones may be mounted on the support frame itself if the arrangement of the furnace and the two cyclones immediately adjacent thereto permit such a disposition. It is understood that this functionally equivalent arrangement is covered by the claimed superstructure.
  • the last one of the series of cyclones serving to cool the product is disposed at a level which is high enough to permit the cooled product to be fed directly by gravity to a complementary cooler, a discharge conveyor, a loading station or the like.
  • FIG. 1 is a circuit diagram schematically showing a calcining installation according to the invention
  • FIG. 2 is a side elevational view of the installation
  • FIG. 3 is another side elevation taken in the direction of arrow F in FIG. 2;
  • FIG. 4 is a top view of the installation.
  • the installation comprises support frame 60 having support means at a first level and comprising, in the illustrated embodiment, first platform means 62 and second platform means 64.
  • the first platform means is positioned higher than the second platform means.
  • Calcining furnace 10 for the thermal treatment of the pulverulent mineral product in suspension in hot gases generated by the combustion of air and a fuel is mounted on support means 62 of support frame 60 at the first level.
  • Two groups of series-connected cyclones 12, 14, 16 and 18, 20, 22 are connected to furnace 10.
  • Conduit means connects the cyclones to each other and to the furnace.
  • this conduit means comprises conduit 24 connecting cyclone 12 to furnace 10, conduit 26 connecting cyclone 12 to cyclone 14 and conduit 28 connecting cyclone 14 to cyclone 16 for successively passing the exhaust gases from the furnace through the cyclones of the one group, and conduit 34 connecting cyclone 18 to cyclone 20, conduit 36 connecting cyclone 20 to cyclone 22 and conduit 38 connecting cyclone 22 to furnace 10 for successively passing a current of air through the cyclones of the other group before entering the furnace to serve as the combustion air.
  • the exhaust gases preheat the product before it enters the furnace and the air current cools the treated product.
  • the exhaust gases are removed by ventilator 30 connected to the outlet, after they pass through filter 32 which removes residual powder particles from the gases.
  • the filtered gases are vented to the atmosphere by the ventilator.
  • Air is supplied to first cyclone 18 of the other group by ventilator 40 through conduit 42 connecting the output of the ventilator to cyclone 18.
  • the air flowing in through conduit 38 is used as combustion air for the fuel injected into the furnace through tuyere 44.
  • the pulverulent product to be treated is introduced into conduit 28 by feeding device 46 and is held in suspension in the conduit by the exhaust gases from furnace 10 flowing through this conduit and the current of gases (indicated by arrows along the conduits) entrains the suspended product to cyclone 16.
  • the pulverulent product is separated from the gases and collected in the lower part of the cyclone whence it is removed by gravity by means of pipe 48 connected to the outlet of cyclone 16 and leading into conduit 26 (see arrow in broken lines).
  • pipe 48 connected to the outlet of cyclone 16 and leading into conduit 26 (see arrow in broken lines).
  • the solid product is separated from the gases and drops through the outlet of the cyclone into pipe 50 which feeds the product in the direction of the arrow indicated in broken lines into conduit 38.
  • the air circulating in conduit 38 entrains the product, which has been preheated by the exhaust gases in conduits 26 and 28 as well as cyclones 14 and 16, to furnace 10.
  • the product is maintained in suspension by the air current and is thermally treated, i.e. calcined, by the heat furnished by the combustion of the air and the fuel injected through tuyere 44.
  • the combustion gases are exhausted from the furnace at the lower portion thereof and the exhaust gases entrain the thermally treated, i.e. calcined, product through conduit 24 into cyclone 12.
  • the solid product is separated from the gases in the cyclone and flows in the direction of the broken arrow through pipe 52 into conduit 36 where the air current carries the thermally treated product successively through cyclone 22, pipe 54, conduit 34, cyclone 20, pipe 56, conduit 42 and cyclone 18 to be cooled by heat exchange with progressively cooler air.
  • the outlet of cyclone 18 is connected to supplemental cooler 58 where the calcined product is subjected to additional cooling.
  • the cooled product may then be directed from cooler 58 to any desired location, such as conveyors, storage bins, loading stations and the like.
  • furnace 10 and cyclones 12 and 22 which have refractory linings because very hot gases pass therethrough and which, therefore, are quite heavy, are disposed at as low a level as feasible to reduce the massiveness of the support means required therefor.
  • Cyclones 12 and 22 should be positioned high enough to permit the thermally treated pulverulent product to flow by gravity through pipes 52 and 54.
  • Furnace 10 should be positioned above cyclone 12 to reduce the length of conduit 24 leading from the lower end of the furnace to the cyclone.
  • the support means of support frame 60 comprises first platform means 62 and second platform means 64, first platform means 62 being positioned higher than second platform means 64.
  • Furnace 10, as well as cyclones 18 and 20 of the downstream group of cyclones are mounted on the first platform means while the two cyclones 12 and 22 immediately upstream and downstream from the furnace are mounted on the second platform means.
  • Superstructure 66 is affixed to support frame 60 and has support means at a second level higher than the first level and remaining cyclones 14 and 16 are mounted on the support means of the superstructure at the higher level.
  • Relatively low support frame 60 is shown to comprise upper platform 62 and lower platform 64 supporting furnace 10 and cyclones 12 and 22, the cyclones being mounted on the lower platform and the furnace on the higher platform.
  • Cyclones 18 and 20 of the downstream group of cyclones also are mounted on upper platform 64.
  • Remaining cyclones 14 and 16 of the upstream group of cyclones are mounted on superstructure 66 which is affixed to support frame 60. This superstructure is much lighter than the support frame because only cooled gases flow through cyclones 14 and 16 so that the latter require no refractory linings and are, accordingly, relatively light.
  • conduit 28 connecting cyclones 14 and 16 also is of U-shape. This disposition has the advantage of permitting better extraction of the heat from the exhaust gases flowing through the conduit. It is, however, only optional and, if desired, the product feeding device may be placed on the upper platform of the support frame or even on the superstructure.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
US06/607,223 1983-05-10 1984-05-04 Installation for the thermal treatment of pulverulent mineral products Expired - Fee Related US4522131A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8307754A FR2545916B1 (fr) 1983-05-10 1983-05-10 Installation de traitement thermique de mineraux sous forme pulverulente
FR8307754 1983-05-10

Publications (1)

Publication Number Publication Date
US4522131A true US4522131A (en) 1985-06-11

Family

ID=9288733

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/607,223 Expired - Fee Related US4522131A (en) 1983-05-10 1984-05-04 Installation for the thermal treatment of pulverulent mineral products

Country Status (7)

Country Link
US (1) US4522131A (fr)
EP (1) EP0125973B2 (fr)
AU (1) AU561129B2 (fr)
CA (1) CA1221233A (fr)
DE (1) DE3460337D1 (fr)
FR (1) FR2545916B1 (fr)
IN (1) IN159051B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353718A (en) * 1992-11-03 1994-10-11 The Babcock & Wilcox Company Remediation of low level radioactive mixed waste in a fluidized bed incinerator
US5878677A (en) * 1995-01-10 1999-03-09 Von Roll Umelttechnik Ag Process for cooling and cleaning flue gases
AT515421A4 (de) * 2014-02-25 2015-09-15 Holcim Technology Ltd Vorrichtung zum Vorwärmen von Zementrohmehl für die Zementklinkerherstellung
CN114829858A (zh) * 2019-12-12 2022-07-29 蒂森克虏伯工业解决方案股份公司 用于热处理矿物的工厂的预热塔的塔结构和用于构造预热塔的方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2167188B1 (es) * 1999-12-17 2003-10-16 Cales De Llierca S A Proceso para la calcinacion de minerales utilizando combustible solido en hornos de cubas regenerativas.
ITMI20112364A1 (it) * 2011-12-22 2013-06-23 Italcementi Spa Apparato per la produzione di clinker a partire da miscela cruda comprendente un preriscaldatore ad altezza contenuta
BE1027848B1 (de) * 2019-12-12 2021-07-14 Thyssenkrupp Ag Turmstruktur eines Vorwärmturms einer Anlage zur thermischen Bearbeitung von Mineralien und Verfahren zum Errichten des Vorwärmturms
BE1029138B1 (de) 2021-02-24 2022-09-19 Thyssenkrupp Ind Solutions Ag Höhenoptimierte Vorrichtung zur Wärmebehandlung von mineralischen Stoffen
WO2022179847A1 (fr) 2021-02-24 2022-09-01 Thyssenkrupp Industrial Solutions Ag Dispositif à hauteur optimisée pour le traitement thermique de substances minérales
DE102021201730A1 (de) 2021-02-24 2022-08-25 Thyssenkrupp Ag Höhenoptimierte Vorrichtung zur Wärmebehandlung von mineralischen Stoffen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004876A (en) * 1974-03-22 1977-01-25 F. L. Smidth & Co. Method of burning pulverous raw material and rotary kiln plant therefor
US4108593A (en) * 1975-10-27 1978-08-22 F. L. Smidth & Co. Method of heat treating pulverulent or granular raw materials and kiln plant therefor
US4288103A (en) * 1979-03-27 1981-09-08 Cajon Company Fluid fitting having gripping bass means for chucking
US4354825A (en) * 1981-02-20 1982-10-19 Mcnally Pittsburg Mfg. Corp. Method and apparatus for drying coal
US4402667A (en) * 1980-01-08 1983-09-06 Krupp Polysius Ag Process and an installation for the heat-treatment of fine-grained material
US4405374A (en) * 1981-04-15 1983-09-20 Voest-Alpine Aktiengesellschaft Process of producing cement and plant for carrying out the process
US4421563A (en) * 1981-05-15 1983-12-20 Fives-Cail Babcock Production of cement clinker

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004876A (en) * 1974-03-22 1977-01-25 F. L. Smidth & Co. Method of burning pulverous raw material and rotary kiln plant therefor
US4108593A (en) * 1975-10-27 1978-08-22 F. L. Smidth & Co. Method of heat treating pulverulent or granular raw materials and kiln plant therefor
US4288103A (en) * 1979-03-27 1981-09-08 Cajon Company Fluid fitting having gripping bass means for chucking
US4402667A (en) * 1980-01-08 1983-09-06 Krupp Polysius Ag Process and an installation for the heat-treatment of fine-grained material
US4354825A (en) * 1981-02-20 1982-10-19 Mcnally Pittsburg Mfg. Corp. Method and apparatus for drying coal
US4405374A (en) * 1981-04-15 1983-09-20 Voest-Alpine Aktiengesellschaft Process of producing cement and plant for carrying out the process
US4421563A (en) * 1981-05-15 1983-12-20 Fives-Cail Babcock Production of cement clinker
US4465460A (en) * 1981-05-15 1984-08-14 Fives-Cail Babcock Production of cement clinker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353718A (en) * 1992-11-03 1994-10-11 The Babcock & Wilcox Company Remediation of low level radioactive mixed waste in a fluidized bed incinerator
US5878677A (en) * 1995-01-10 1999-03-09 Von Roll Umelttechnik Ag Process for cooling and cleaning flue gases
AT515421A4 (de) * 2014-02-25 2015-09-15 Holcim Technology Ltd Vorrichtung zum Vorwärmen von Zementrohmehl für die Zementklinkerherstellung
CN106029598A (zh) * 2014-02-25 2016-10-12 霍尔辛姆科技有限公司 用于预热用于制造水泥熟料的水泥生料的装置
US20170016669A1 (en) * 2014-02-25 2017-01-19 Holcim Technology Ltd Device for Pre-Heating Cement Raw Meal for Cement Clinker Production
CN114829858A (zh) * 2019-12-12 2022-07-29 蒂森克虏伯工业解决方案股份公司 用于热处理矿物的工厂的预热塔的塔结构和用于构造预热塔的方法

Also Published As

Publication number Publication date
DE3460337D1 (en) 1986-08-28
AU561129B2 (en) 1987-04-30
AU2781784A (en) 1984-11-15
IN159051B (fr) 1987-03-14
EP0125973B2 (fr) 1991-01-09
FR2545916B1 (fr) 1985-07-19
EP0125973B1 (fr) 1986-07-23
FR2545916A1 (fr) 1984-11-16
CA1221233A (fr) 1987-05-05
EP0125973A1 (fr) 1984-11-21

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Owner name: FIVES-CAIL BABCOCK 7 RUE MONTALIVET, 75383 PARIS F

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEBESGUE, JEAN;REEL/FRAME:004256/0890

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Effective date: 19970611

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Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362